Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Non-Cash Compensation Expenses

Stock-based non-cash compensation expense related to stock options, restricted stock grants, and the employee stock purchase plan were recorded in the financial statements as follows (in thousands):

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2017		2016		2017			2016
	(unaudited)				(unaudited)
Cost of revenues	$	—	$	—	$	—		$	3
Selling and marketing		5		84		(28	)		238
Research and development		44		128		169			375
General and administrative		119		196		463			557
Restructuring expense		—		—		398			—
Total non-cash stock compensation expense	$	168	$	408	$	1,002		$	1,173